An imaging element includes: a plurality of color filters arranged in a Bayer array; photoelectric conversion elements provided for the respective color filters; a signal adder circuit which carries out additions in each of the unit grids, by (i) adding up signals outputted from two photoelectric conversion elements corresponding to different colors of two color filters out of four color filters, and (ii) adding up signals outputted from two photoelectric conversion elements corresponding to remaining two color filters; and an A/D converter. The imaging element outputs: (i) a first digital image signal where signals of one color out of Ye (yellow) and Cy (cyan), and signals of G, are alternately placed; and (ii) a second digital image signal where signals of an other color out of Ye and Cy, which is different from the one color, and signals of Mg (magenta), are alternately placed.